Receiver headband



Dec. s, 1927. 1,651,623

H. F. OBERGFELL RECEIVER HEADBAND Original F|' uct. 2. 1922 Patent 'en 6, 1927.

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HERBERT F. OBERGFELL, OF RIVER FOREST, ILLINOIS, SSIGNOB, BY MESNE AS- SIGNMENTS, TO AUTOMATIC ELECTRIC INC., F CHICAGO, ILLINOIS, A CORPORA- TION OF DELAWARE.

ancnrvnn HEADBAND.-

Application led October 2, 19.22, Serial No. 591,819.- Benewed August 8, 1925.

This invention relates 1n general to re-` ceiver headbands, but more particularly to double headbands of the adjustable type such as are commonly used for radio receiv- 51ers; and the object of the invention is to devise an improved article of the class referred to having certain features of novelty, rendering it cheap to manufacture and at the same time more convenient and pracframe member as seen from the inside of the headband;

Figure 3 is a cross section of the same frame member on line A-A in Fig. 2;

Figure 4 is another view of one of the clevises shown in Fig. 1; 1

Figure 5 is-a cross section on line B -B in Fig. 4; and

Figures 6to 9, inclusive, are details of the vjoint by means of which one of-the clevises is attached to the adjustable extension of the associated frame member. J 3e In general, the headband comprises two flexible leather covered steel bands, curved e to fit the head; two substantially vertical frame members by means of which the bands are held together at opposite ends; two agjustable extensions,`one for each of the fra e members; and two clevises, one of which is attached to each extension by means of a joint so constructed as to permit of a limited rotary movement.

or raceway for the adjustable 'extension which projects from the lower end. The

two side pieces 4 and 5 are alike, and are Considering the frame member shown in'k securedtogether at the upper end by means of six rivets and by means of a 'ferrule 6 at the lower end. Four of the rivets which hold the side pieces together are also instrumental in retaining the steel bands in place, as is shown most clearly in Fig. 3. Considering the method of attaching the bands to the frame members more in detail, the

`frame members are cut away slightly at theV upper corners as shown in Figs. 1 and 2 to admit the leather coveredfbands, suicient material being left, however, to grip the ends of the leather covering when the whole is assembled. This is clearly illustrated in Fig. 3, which also shows the means by which,`

the steel band 3, for example, ispositioned in the-center of the frame structure. This comprises a fiber strip 7l inserted between the left-hand frame member 4 and the steel band 3 and rivets 15and 16, each of which has an enlarged shank occupying the space between the band 3 and theframe vmem-ber 5.

It will be seen. that the construction illustrated in Fig.v 3 affords a simple and effective means for positioning the steel band in the center of the frame and for retaining it rigidly connected thereto, while at the same time the leather covering of the band is held also. and is prevented from workin back away from the frame to. leave the ban exposed.`

Theframe membersl 4 and are recessed slightly .at thelbottom to form a slot coinciding with a slot in ferrule 6, through which the extension y8 projects as shown in Fig. 3. This extension is a Hat strip of hard elastic material preferably German silver, and at its upper end is provided with means which l permit the extension to be adjusted with respect to the distance which it projects out of the frame member and which serves to retain the extension in `any adjusted position. The means referred to comprises two steel springs 9 and 10, Fig. 3, which are secured on opposite sides of the extension 8 by rivets lland 12. The rivets 11 and 12 are provided with enlarged heads which lie in the longitudinal depressions or troughs 13 and 14. The head 01 rivet 11 obviously limits the degree to which the extension may 13 and 14, and are stiff enough to be adjusted outwardly by'engagng theend of the depression 13, while Ain a similar manner the head of rivet 12 by engaging' the end of depression 14, limits the adjustment whiehthe clevis 9 is attached to the extension-8, it should be stated' that this joint.

is designed especially'to afford a strong and permanent connection, of the non-rigid type, which will permit a certain limitedmovement of the clevis 9 without appreciable wear of 'thev parts from continued, use. In addition tothe extension8 and the clevis '9, the joint comprises 'only two parts, awasher 16, and a slotted rivet shaped member 17.

The washer '16 is illustrated in Figs. 6 and 7, while the .member 17 is illustrated 1n Figs. 6 and 8. The member 8-is cut away at 18 to a width. just sufficient to fit tightly within the slot in washer 16, Iand at 19 to a width just sufficient to fit within the slot in member 17. The latter member has a shank l in the slot in the washer, and vthewasher 'ly- 20 of the same diameter as the central hole in washerl, the' shank having an enlarged portion 21 of the same diameter as the central hole in the clevis 9. To assemble thejoint,lthe washer 16-is placed on themember 8 with' ythe portion 18 thereof fitting withmg up 'against the last shoulder. The clevis `9- is then placed in. position next to the time assing through the slot in member 17. en.assembled in ,this manner, thev portion 19 of extension 8 will project-a short washer 16 after which member 17 ispassed through the hole inthe clevis'andthe hole distance vthrough the slot'in'member17 and pset by riveting to 4hold-'the fr parts firmly m place. Figure 4'shows 'the complete joint assembled. .It'will'be seen that the combination ofthe washer 16and the rivet shaped member'17 form 'a miniature spool, Fig. 9, having two semieynndri'cnrtions such as 21 whichv forma bearing orthe clevis 9.' .As seen in Fig. 9',l and also clevis 9. The Biotin 'clevis fin Fig. 5, the portion 18 of the 'extension .8 1s off greaterwidth than the"diameter' .of

the slotted shank comprising the 'semi-cylin- 'dric'al members 21, and, therefore, projects .from the slot on each side to form two w which he 1n 'the slot which is cut'inlftlg: 9 isofagreater width than the` of extension 8', thusl clevis 9 to bemtated a vstampings, rivets *stampings and bandto ho d the 'sald parts y together, said rivets having enlarged Shanks in'washer16, the extension 8 at the same .f

the 'slot throu amount aboutl the shank of'member l17 as It will be understood thatfthe righthandl frame member, extension, and clevis are constructed in exactly the same way as the one which has been described.

Having thus described my invention, what I consider to be new and desire to have provtectedby' Letters Patent will be pointed out in the appended claims:

1. In a receiverheadband, two frames, a flexible band .connecting saidframes to form an inverted U-shaped structure, a non-rotatable extension projecting downwardly from 'each frame, means permitting longitudinal adjustment of each extension with respect to its associated frame, two clevises, and jointsV connecting said clevises to said extensions, each joint being so constructed that a wedgeshaped portion of said extension passes lthrough a rectangular opening in -said clevis which is wider than said extension so as to permit a limited rotationof the associatedA clevis.v j

2. In a receiver headband, two fan-shaped hollow frames, two flexible bands' connectlng l UU metal -stampings assembled with the up-"A turned edges together tov form a hollow frame,.a metal bandA entering a' slot formed` by recessing the corresponding edges of said passin' through said or spacing said band from one of said stampings,a washer spacing said band from the other -ofsaid stampings, and acove for said band. glrip'ed' between the sides o amei s 4. In a. recelver headband, two concave on PP0' site .sides of `said extension an resslng'A loutwardly against. the -sides of the am metal stam-pings vassembled with the up- -turned edges v'together Lto form a hollow retain the extension in.place, two.rivetsse I curing said springs to said extension, and enlarged heads or projections onsaid rivets lying 1n -lon tudmal depressions insaid stampings an ment of said extensions.'

5. In a receiver head rd, `the combinase'rving 'to limitthe adjust-" 1 "ian tion,

. `mamas with a flat metal extension member, of a slotted washer and a slotted rivet shaped member passed over the end of saidmetal extension and forming a spool, the width of said extension being greaternthan the diameter of the spool body so as to form two wings, and a clevis pivoted on said spool and having a slot for receiving said wings, the slot being wider than the thickness of the wings to permit a limited rotation of 1 the clevis.,

6. In a recelver head-band, twoI fanshaped hollow frames, two flexible bands connecting said. frame at the wide ends thereof to form an inverted U-shaped structure, an extension projecting downward from the narrow end of each frame, said extension having its upper portion wholly concealed within the associated frame.

' 7. In' a receiver head-band, two fanshaped hollow frames, two flexible bands connecting said frames at the wide vends thereof to form an inverted U-shaped structure, an extension projecting. downward from the narrow end of each frame, said extension having its upper portion wholly concealed within the associated frame, and a clevis connected to the outside end of each extension by a joint which permits only a limited rotary movement.

8. In a receiverheadband, two concave metal stampings assembled with upturned edges together to form a hollow frame, a

' metal band Aenteringa slot formed by revcessing the corresponding edges of said stamping, rivets passing through said stampings and band'to hold the said parts together, a washer spacing said band from one of said stam ings, and a covering for said band grippe between the sides of the slot through which the band enters the frame.

9. In a receiver headband, two concave metal stampings assembled with the upturned edgesA together to form a. hollow frame, an adjustable extension entering the lower end of said. frame through a slot formed by recessing corresponding edges of said stampings, two springs for retaining said extension in place, and two rivets securing said springs to. said extension.

10. In a receiver headband, two concave metal stampings` assembled with the upturned edges together to --ttorm a hollow frame, an adjustable extension entering the lower end of said frame through a slot formed by recessing correspondingedges of said stampings, two springs for retaining said' extension in place, two'rivets securing .said springs to said extension and serving to, limit the adjustment-otl said extension.

.11. In a recelver head-band, the combination, with a'flat metal extensionrmember, of a slotted washer and a slottedl rivet shaped member passed over the endof said -metal .ceiver and a extension,y and form-ing a spool, the width of said extension bein greater than the diameter of the spool ody so as to form two wings, and a clevis pivoted on said spool and having a slot for receiving said wings.

12. In a receiver head-hand, two concave metal stampings assembled with upturned edges together to form a hollow frame, an adjustable extension entering the lower end of said frame through a slot formed by, recessing corresponding edges of said stampings, two springs secured to the upper por tion of said extension and lying on opposite sides of saidy extension and pressing outwardly against the sides of the frame with suiicient tension toretain the 4extension in place, and said. upper plortion of thMeXtension and said springs w olly concealed within the associated frame.

13. A telephone head set comprising a receiver and a head band, a connection between the receiver and head band having the power of extension by tubular joints slidin one within the other, one of said joints eing provided with two members for limiting the movements of saidv joints, and with means for holding said joints in desired position relative to each other.

14. A telephone head set comprising a re- 'springs projecting into said other joint and cooperating therewith for limiting the movement of said joints and for holding said Ajoints in desiredv positionv relativeto each other. j i

15. A telephone head set comprising a receiver and a head band, a connection between the receiver and head band consisting of tubular joints sliding one within the other, one of said 'oints'being rectangular in cross section, and3 provided with members for limitin 4he movements of said joints and for ho ding said'jointsin desired position relative to one another.

16. A teleplhone head set comprising a reead band. a connection between the receiver and head band consistin ofan outer joint anda inner joint, sai inner joint being rectangular in cross section and sliding longitudinally within saidouter joint,

- and'l projections provided on said inner joint receiver and a head band, an adjustable l tubular joint between the receiver and head band consisting of 'a hollow frame, a rectangular extension slidable longitudinally wit in said frame, and means provided in said frame and on that extension and coop- A erating with each other for holding said exframe, two springs for retaining said exten- I0 tension in a desired position relative to said sion in place, and two rivets securing Said frame and for limiting the movement theres rings to said extension and serving to linit of the adjustment thereof.

1|, .l8r In a telephone head set comprisin a In witness whereof, I hereunto subscribe receiver and a head band, an adjusta le my name this 30th day of September, A. D., 1I joint between the receiver and head band 1922.

consisting of a hollow frame, a rectangular extension slidable longitudinally within said HERBERT OBERGFELL. 

